Method for making surface-reinforced glass

Details Method for making surface-reinforced glass Method for making surface-reinforced glass

1991-08-07

1992-07-28

Lindsay, Robert L.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3013, 65 605, 65 608, C03C 2504

Patent

active

051337916

ABSTRACT:
Glass is surface reinforced by providing a surface layer which contains an oxide component, typically silicon oxide in more excess than the underlying base glass, the oxide component exhibiting higher chemical or mechanical durability than the base glass itself. A surface of glass is tailored by a dry process, typically by exposure to UV radiation in the presence of ozone such that the oxide component is present more at the surface than in the underlying glass while a heavy metal such as Pb is driven out. A magnetic head having such a surface-reinforced sealing glass for bonding a core block to a slider is highly reliable.

REFERENCES:
patent: 2834689 (1958-05-01), Jupnik
patent: 3573948 (1971-04-01), Tarnopol
patent: 4014772 (1977-03-01), Woods et al.
patent: 4028080 (1977-06-01), DiVita et al.
patent: 4092139 (1978-05-01), Ference
patent: 4188452 (1980-02-01), Groth
patent: 4874417 (1989-10-01), Winterburn

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